Find the first term, the common difference, and give a recursive formula for the arithmetic sequence.6th term is -10; 15th term is -46
A. a1 = -30, d = 4, an = an-1 + 4
B. a1 = 10, d = 4, an = an-1 + 4
C. a1 = 10, d = -4, an = an-1 - 4
D. a1 = -10, d = -4, an = an-1 - 4
Answer: C
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.
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.
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< 0
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. 
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